Wall unit for a bathtub



FIG. 1 is a front perspective view of a wall unit for a bathtub showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a cross sectional view taken on line 3--3 of FIG. 2;

FIG. 4 is a cross sectional view taken on line 4--4 of FIG. 2;

FIG. 5 is a cross sectional view taken on line 5--5 of FIG. 2;

FIG. 6 is a fragmentary cross sectional view taken on line 6--6 of FIG. 4; and

FIG. 7 is a fragmentary cross sectional view taken on line 7--7 of FIG. 4. 

The ornamental design for a wall unit for a bathtub, as shown. 